Even in 3s, most ret cleave comps seem to me to be built around using FV. Even ret/rogue relies mostly on stuns and slows to do its cc.
The way I see it, unless you insist on playing with a hunter or a mage (unlikely in the first WoD season, as melee prolly gonna dominate), FV+divine purpose for massive aoe spam is going to be both most fun and most effective, unless ofc you're Avangelyne or Vanguards and can actually get maximum benefit from other talents.
I don't see any reason for using DS in arena.
And a good defense is still a good offensive.
We also have a saying here: "Attack is the best defense".
That was my point earlier. You're using a phrase that means you should be more aggressive instead of defensive. So how does that support your cause? I don't understand. You want to play very defensively with EmpSeals, so how does this expressions work in your favour? It directly contradicts you. I'm not sure you understand it.
Anyway I'm planning on playing Ret again in PvP, haven't done it seriously ever since WotLK because I felt the playstyle was garbage efter after. Being forced to play gimmick comps such as Ret/Hunter where you were completly reliant on your partners and their classes just felt too boring for me.
Our damage is pretty average on beta, so I hope it will be enough for PvP to actually be competitive on a high level.